Feed-water-circulating system for boilers.



E. MARSH & JI PHLLIPS.

lFEED WATER GEEGULATIN@ SYSTEM EOE BOILEEB.

APPLIUATION FILED MAY24, 1912.

2 SHEETS-SHEET l.

may www l Patented Apr. l, 1913.

l 'rif/rl futili IVI glp/5710111,

APPLICATION FILED MAY 24, 1912.

F MARSH L r G PHILLIPS FEED WATER GIRGULATING SYSTEM FOR BOILEES.

.. fa/LM C/ f/ fw To all whom t may concern:

UNITED srafrns reggiana barriera.

FRANKLIN MARSH, or MILWAUKEE, ann .Torna e. rHrLLIPs, or GREEN BAY,

. wisconsin FEED-WATER-CIRCULATING SYSTEM FOR BOILERS.

Be it known that we, FRANKLIN MARSH and JOHN G. PHILLIPS,- both citizens of the United States, and residents of Milwaukee, in the county of Milwaukee and State ot' Wisoonsim and of Green Bay, in the county vor Brown and State of Wisconsin, respectively, haVe invented certain new and useful Improvements in Feed-Water-Circulating Systems for Boilers; and we do hereby declare that the following Yis a full, clear, and

vexact description thereof.

Our invention refers to feed-water heaters and has for its object to providesimple, economical and eective feed-water heaters to be utilized in conjunction with the arch- -tubes of aboiler fire-box.

The invention is especially applicable to locomotive fire-boxes of the above type and embodies a header having a series of discharge nozzles, one of which extends into the mouth of each arch-tube, water to the header being supplied by the usual pair of injectors, which injectors in thisvinstance have their delivery pipes coupled in the form of al'oop to opposite ends of a valve-controlled feed-pipe having a branch in communication with a header. By the above arrangement it is lappa-'ent that the jets of feed-water traveling through the arch-tubes will be heated to a high temperature and be discharged into the lower portion of the boiler adjacent to the mud ring at approximatelythe same temperature as the water contained in the boiler. Thus uneven expansion of the tube-sheets and its consequent leakage of tubes due to the variation in temperature is avoided, whereby the life of the boiler is materially increased. Furthermore the water-jets being discharged into the mouths of the arch-tubes at comparatively low temperature will crea-te a current or circulation of water from the bottom ot the boiler upwardly adjacent to the tire-box back-tube sheet, over the crown-sheet and down through the water-space between the back head and back-sheetof the tire-box, this continuous flow serving to prevent burning ont o f the crown-sheet due to the fact that mud deposits thereon will-.be continually agitated whereby the 'crown-sheet is kept clear.

Specific objects of our invention are to provide a simple and. convenient means of attaching the header 11o/.ales to the backspecieation of Letters rat-eat.

yatentcd Apr. 1,3913.

Application filed May 24:) 1912. Serial N o. 699,485.

head of the boiler whereby said nozzles may be quickly removed for repairs or for the purpose oflcleaning out the arch-tubes; to provide clean-out apertures in connection with the header in alinement with the nozzles, andto provide simple and e'ective means for connecting a .valve-controlled feed-pipe to the header, which 'feed-pipe in conjunction with the injector delivery pipes forms a loop.

With the above and other objects in view the invention consists i-n cert-ain peculiarities of construction and combination of parts as set forth hereinafter with reference to the accompanying drawings and subsequently claimed.

ln 'the drawings Figure 1 represents a sectional elevationv through the lire-box of a locomotive boiler, the arch-tubes of said lirebo'r being equipped with a feed water heating appliance embodying the features of our4 invention; 2, a detailed sectional plan view of the feed-water mechanism, the section being indicated by line 2-2 of Fig. l, and Fig. 3, a vertical sectional view of the same, the section being indicated by line 3-3 of Fig. l.

Referring by characters. to the drawings,

l represents the back head of'a boiler provided with a tire-box opening 2, and 3 the roof-sheet of said bbiler that is connected to the back-head in the usual manner. Secured to the back-head, by suitable stay-bolts and spaced therefrom is the usual back-sheet 4 ot the tire-box hav-ing connected thereto a crown-sheet that is suspended from the roof-sheet by the ordinary stay-bolts. The crown-sheet is also connected to the back tube-sheet G which carries the usual-tubes 7 that are beaded therein. The ash-pit mouth of the lire-box also carries the usual gratebars 8 and 'the water-space between the throat sheet 9 and lower portion of thebacktube sheet 6 is closed byfamudring 10, which mud ring also' serves as a closure for the water space between -the bottom edges ot the back-head l and back-sheet i of the tire-box. A series of longitudinally disposed arch-tubes 1l are arranged within the firebcx, the inlet and discharge mouths of which tubes communicate with the boiler and are respectively beaded into the back-sheet 4 et said fire-box and back-tube sheet 6 thereof. rThe arch-tubes also serve as supports for a brick arch 11,it being understood that all tures for the, reception of threaded ends of n ,of the tubes whereby a Water space is v the ordinaryboiler type and forms no part 'of threaded apertures 12 for the reception that carries a. nipple 18 which .in turn is tion from the feed-Water pipe to the header.

globe valves at the end of the'fee'd water Acrosses l'whereby the parts may be more pipe being in communication with an incrmneclioinito the header, the Water flowing of the before mentioned construction is of of our invention.'

The backhead 1 is provided with a series of similarly threaded plugs 13, which plugs are provided with internally threaded aperwater discharge nozzles 14, the ends of the same bein extended into the arch-tubes a predetermlned distance, said 'nozzles being of lesser diameter than the inner diameter coupled to a. T 19 of a feed-Water pipe 20, the nipple 18V constituting a branch connec- The feed-Water vipe is alsoprovided with a pair of inward y opening check-valves 21 and globe-valves22, whereby the Watersupply is controlled. lNhileWe have shown the pipe it is understood that Without departing from the spirit of our invention We may place the same in the intermediate positionu assumed by the check-valves in which instance the Iposition of said check-valves and globe valves would be reversed. It should also be understood that in some instances We may provide a slightly yielding coupling connection between the pipe section 17 and readily alined with the back-head apertures 12 and While We have shown and described screW-'plugs in threaded union with the apertures 12 Wemay, Withoutdeparting from the spirit offo'ur invention, in some instances dispense with the same and bead the discharge nozzles 14 directly in said apertures. The ends of the feed-pipe 20|are each connected to one end et' an injector delivery pipe 23, the opposite end of said delivery jector't whereby water is delivered totheA nozzles. As 'shown we may in some in stances employ brackets 25 for the sup ort of the feed-water 'pipe whereby strain o the pipe conncetionsis relieved fromtht joints. I n the operation of our device feed'- water is discharged through' the,v delive pipe 211 from either injector into the feetpipp 20 anrvlt'roni thence through the branch? in either direction from said branch to the discharge nozzles in Which the Water is delivered in a fine jet tothe arch-tubes and owing toV their positions the Water so delivered is in its travel downward heated to a high degree of temperature approximately equal to the body of the water within the boiler. The water after being heated in its downward travel is 'discharged at the bottom of the boiler adjacent to the throat sheet fromt which point it is distributed and oW- ing to the injector effect caused by the water being discharged from the nozzles a circula tion will be maintained whereby Vthe Water Will travel in the direction of the arrows as indicated in F ig. 1, first upwardly adjacent to the back-tube sheet, over the crown-sheet and returning to the arch-tubes through the water space between the back-head 1 and back-Sheet of the tire-box 4 to the` intake mouths of the tubes. This current of Water serves to clear the crown-sheet of any mud deposits and will thus prevent the same from burning and furthermore the current of water traveling through thearch-tubes Will also materially increase the life of the latter, it being found in practice that Where such arch-tubes are utilized that countercurrents of water will intercept each other Within the tubes and block circulation to such an extent-that the intense heat at points in thearch tubes would cause the latter to burn. Furthermore the water being heated i to theI degree stated before it is discharged intothe bottom of the boiler will prevent 100 uneven expansion whereby the tube-heads usually draw and loosen the flues. It is furthcrobserved that owing to the alinemcnt ot' the apertures l2 of the back-head with the mouths et' the arch-tubes that said 105 arch-tubes can be readily accessible for renewal purposes. It is also apparent that While we have shown the boiler as being prov vided with a pair of injectors that in some instances one may be employed With efii- 110 cicncy and that. while We have described` the invention in connection with a locomotive boiler thathsaid invention will operate with equal eiiiciency in conjuuction with a stationary boiler. lt is also apparent that thc 115 feed-vvater heating.;` apparatus as shown and described can readily be attached to any type of arch-tube boiler without ldisman-y tling any ofthe parts and that said device can be cheaply constructed from standard fit- 1.20 tin s.

e claiinr- 1. In a' boiler having a fire-box comprisin a back-head, a spacedback-sheet, back tu 1 sheet and crown-sheet connecting the 125 back-sheet and back tube sheet, and aser-ics of arch-tubes constituting Water channels `connecting the fire-box back-sheetland back `tube sheet, the back-head *being provided with threaded apertures alined withv the j www@ la series of end threaded nozzles in connection With the threaded plug apertures, the

discharge ends of the nozzles. being extended.

into the mouths of the'arch-tubes acrossthe -intervening space between the back-head lofand'back-sheet, nipples in threaded union with the threaded apertures of said plugs, the nipples being extended beyond the backhead, and a header invcommunicaton with said nipples.l

'2.,A fitting for feed-Water circulating systems comprising a sectional headerpipe, t e sections being connected by crosses, one series of branches of which crosses are provided with header nipples'and the correspondin alined series ofbranchesprovided with en closures, a series of plugs-having threadedapertures in union rwith the header nipples, zles in threaded unin with the apertured plugs, and a :feed-pipe in communication with the header. A

In 'testimony' that We claimthe foregoing We have hereunto set our hands at Mil- Waukee in the county of Milwaukee and State of Wisconsin in the presence of two lWitnesses. y, ,f FRANKLIN MARSH. JOHN G. PHILLIPS. Witnesses:

CAsANAvF.y YOUNG, MAY DowNnY.

a series of tapered discharge noz- 

